<template>
  <div>
    <el-card>
      <el-alert
        title="注意：只允许为第三级分类设置相关参数！"
        show-icon
        :closable="false"
        type="warning"
      >
      </el-alert>
      <!--选择商品分类-->
      <el-row>
        <el-col>
          <span>选择商品分类：</span>
          <!--级联选择框-->
          <el-cascader
            v-model="selectedCateKeys"
            :options="list"
            :props="cateprops"
            expandTrigger="hover"
            @change="handleChange"
          ></el-cascader>
        </el-col>
      </el-row>
      <!--页面-->
      <el-tabs v-model="activeName" @tab-click="handleTabClick">
        <!-- 添加动态参数的面板 将标签页改为many -->
        <el-tab-pane label="动态参数" name="many">
          <el-button
            size="mini"
            type="primary"
            :disabled="isButtonDisabled"
            @click="addDialogVisible = true"
            >添加参数</el-button
          >
          <!-- 动态参数表格 -->
          <el-table :data="manyTableData" border stripe>
            <!-- 展开行 -->
            <el-table-column type="expand"></el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index"></el-table-column>
            <el-table-column label="参数名称" prop="attr_name"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button
                  size="mini"
                  type="primary"
                  icon="el-icon-edit"
                  @click="editDialogVisible = true"
                  >编辑</el-button
                >
                <el-button
                  size="mini"
                  type="danger"
                  icon="el-icon-delete"
                  @click="removeParams(scope.row.attr_id)"
                  >删除</el-button
                >
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
        <!-- 添加静态属性的面板 将标签页改为only -->
        <el-tab-pane label="静态属性" name="only">
          <el-button
            size="mini"
            type="primary"
            :disabled="isButtonDisabled"
            @click="addDialogVisible = true"
            >添加属性</el-button
          >
          <!-- 静态属性表格 -->
          <el-table :data="onlyTableData" border stripe>
            <!-- 展开行 -->
            <el-table-column type="expand"></el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index"></el-table-column>
            <el-table-column label="属性名称" prop="attr_name"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button
                  size="mini"
                  type="primary"
                  icon="el-icon-edit"
                  @click="editDialogVisible = true"
                  >编辑</el-button
                >
                <el-button
                  size="mini"
                  type="danger"
                  icon="el-icon-delete"
                  @click="removeParams(scope.row.attr_id)"
                  >删除</el-button
                >
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>

        <el-dialog
          :title="'添加' + titleText"
          :visible.sync="addDialogVisible"
          width="50%"
        >
          <!-- 添加表单 -->
          <el-form
            :model="addForm"
            :rules="addFormRules"
            ref="addFormRef"
            label-width="100px"
          >
            <el-form-item :label="titleText" prop="attr_name">
              <el-input v-model="addForm.attr_name"></el-input>
            </el-form-item>
          </el-form>
          <span slot="footer" class="dialog-footer">
            <el-button @click="addDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="addParams">确 定</el-button>
          </span>
        </el-dialog>

        <!-- 修改参数或属性对话框 -->
        <el-dialog
          :title="'修改' + titleText"
          :visible.sync="editDialogVisible"
          width="50%"
          @close="editDialogClosed"
        >
          <!-- 添加表单 -->
          <el-form
            :model="editForm"
            :rules="editFormRules"
            ref="editFormRef"
            label-width="100px"
          >
            <el-form-item :label="titleText" prop="attr_name">
              <el-input v-model="editForm.attr_name"></el-input>
            </el-form-item>
          </el-form>
          <span slot="footer" class="dialog-footer">
            <el-button @click="editDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="editParams">确 定</el-button>
          </span>
        </el-dialog>
      </el-tabs>
    </el-card>
  </div>
</template>

<script>
export default {
  name: "",
  data() {
    return {
      list: [], //商品分类
      cateprops: {
        value: "cat_id",
        label: "cat_name",
        children: "children",
      },
      selectedCateKeys: [],
      activeName: "many",
      //用来保存动态参数数据
      manyTableData: [],
      //用来保存静态属性数据
      onlyTableData: [],
      //控制添加参数.属性对话框的显示或隐藏
      addDialogVisible: false,
      //添加参数的表单数据对象
      addForm: {
        attr_name: "",
      },
      //添加表单验证规则
      addFormRules: {
        attr_name: [{ required: true, message: "请输入名称", trigger: "blur" }],
      },
      //控制修改参数.属性对话框的显示或隐藏
      editDialogVisible: false,
      //修改参数.属性对话框中的表单
      editForm: {
        attr_name: "",
      },
      //修改表单的验证规则
      editFormRules: {
        attr_name: [{ required: true, message: "请输入名称", trigger: "blur" }],
      },
    };
  },
  mounted() {
    this.getlist();
  },
  methods: {
    //商品分类列表
    async getlist() {
      let { data: res } = await this.$http.get("categories");
      this.list = res.data;
    },

    //级联选择框变化会触发
    async handleChange() {
      //当用户在级联菜单中选择内容改变时触发
      console.log(this.selectedCateKeys);
      //发送请求，根据用户选择的三级分类和面板获取参数数据
      const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
        params: { sel: this.activeName },
      });
      if (res.meta.status !== 200) {
        return this.$message.error("获取参数列表数据失败");
      }

      console.log(res.data);
      if (this.activeName === "many") {
        //获取的是动态参数
        this.manyTableData = res.data;
      } else if (this.activeName === "only") {
        //获取的是静态属性
        this.onlyTableData = res.data;
      }
    },
    handleTabClick() {
      console.log(this.activeName);
      this.handleChange();
    },
    addParams() {
      //当用户点击对话框中的确定时，校验表单
      this.$refs.addFormRef.validate(async (valid) => {
        //校验不通过，return
        if (!valid) return;
        //校验通过，发送请求完成添加参数或者属性
        const { data: res } = this.$http.post(`categories/${this.cateId}/attributes`, {
          attr_name: this.addForm.attr_name,
          attr_sel: this.activeName,
          attr_vals: "a,b,c",
        });

        console.log(res);
        if (res.meta.status !== 201) {
          return this.$message.error("添加" + this.titleText + "数据失败");
        }
        this.$message.success("添加" + this.titleText + "数据成功");
        this.addDialogVisible = false;
        this.getCateList();
      });
    },
    async showEditDialog(attr_id) {
      //发起请求获取需要修改的那个参数数据
      const {
        data: res,
      } = await this.$http.get(`categories/${this.cateId}/attributes/${attr_id}`, {
        params: { attr_sel: this.activeName },
      });
      if (res.meta.status !== 200) {
        return this.$message.error("获取参数数据失败");
      }
      this.editForm = res.data;
      //显示修改参数.属性对话框
      this.editDialogVisible = true;
    },
    editDialogClosed() {
      //当关闭修改参数.属性对话框时
      this.$refs.editFormRef.resetFields();
    },
    editParams() {
      //验证表单
      this.$refs.editFormRef.validate(async (valid) => {
        if (!valid) return;

        //发送请求完成修改
        const {
          data: res,
        } = await this.$http.put(
          `categories/${this.cateId}/attributes/${this.editForm.attr_id}`,
          { attr_name: this.editForm.attr_name, attr_sel: this.activeName }
        );

        if (res.meta.status !== 200) {
          return this.$message.error("获取参数数据失败");
        }
        this.$message.success("修改" + this.titleText + "数据成功");
        this.editDialogVisible = false;
        this.handleChange();
      });
    },
    async removeParams(attr_id) {
      //根据id删除对应的参数或属性
      //弹窗提示用户是否要删除
      const confirmResult = await this.$confirm(
        "请问是否要删除该" + this.titleText,
        "删除提示",
        {
          confirmButtonText: "确认删除",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => err);
      //如果用户点击确认，则confirmResult 为'confirm'
      //如果用户点击取消, 则confirmResult获取的就是catch的错误消息'cancel'
      if (confirmResult != "confirm") {
        return this.$message.info("已经取消删除");
      }

      //没有取消就是要删除，发送请求完成删除
      const { data: res } = await this.$http.delete(
        `categories/${this.cateId}/attributes/${attr_id}`
      );

      if (res.meta.status !== 200) {
        return this.$message.error("删除参数数据失败");
      }
      this.$message.success("删除" + this.titleText + "数据成功");
      this.handleChange();
    },
  },
  computed: {
    //添加计算属性用来获取按钮禁用与否
    isButtonDisabled() {
      return this.selectedCateKeys.length !== 3;
    },
    //获取选中的三级分类id
    cateId() {
      if (this.selectedCateKeys.length === 3) {
        return this.selectedCateKeys[this.selectedCateKeys.length - 1];
      }
      return null;
    },
  },

  watch: {},
};
</script>

<style lang="scss" scoped>
.el-row {
  margin: 15px 0px;
}
.el-table {
  margin-top: 10px;
}
</style>
